# a={'aaa':1,1:2}
# print(a)

# operator_dict={'<':'less than','==':'equal'}
# print('Here is the original dict:')
# for x in sorted(operator_dict):
#    print(f'Operator {x} means {operator_dict[x]}.')
# print(" ")
# operator_dict['>']='greater than'
# print("The dict was changed to:")
# for x in sorted(operator_dict):
#    print(f'Operator {x} means {operator_dict[x]}.')

# l=['Niumei','Niu Ke Le','GURR','LOLO']
# d={'Niumei': 'Nowcoder','GURR': 'HUAWEI'}
# for i in l:
#     if i in d:
#         print(f'Hi, {i}! Thank you for participating in our graduation survey!')
#     else:
#         print(f'Hi, {i}! Could you take part in our graduation survey?')

# d1={'name': 'Niuniu','Student ID': 1}
# d2={'name': 'Niumei','Student ID': 2}
# d3={'name': 'Niu Ke Le','Student ID': 3}
# l=[]
# l.append(d1)
# l.append(d2)
# l.append(d3)
# for i in l:
#     print(f"{i['name']}'s student id is {i['Student ID']}.")

# d={'Beijing': {'Capital': 'China'},'Moscow': {'Capital': 'Russia'},'Paris': {'Capital': 'France'}}
# for i in sorted(d):
#     print(f"{i} is the capital of {d[i]['Capital']}!")

# d={'Allen': ['red', 'blue', 'yellow'],'Tom': ['green', 'white', 'blue'],'Andy': ['black', 'pink']}
# for i in sorted(d):
#     print(f"{i}'s favorite colors are:")
#     for j in d[i]:
#         print(j)

# l1=input().split()
# l2=input().split()
# print(dict(zip(l1,l2)))

# l1=input().split()
# l2=input().split()
# m={}
# for i in range(len(l1)):
#     m[l1[i]]=l2[i]
# print(m)

# d = {
#     "a": ["apple", "abandon", "ant"],
#     "b": ["banana", "bee", "become"],
#     "c": ["cat", "come"],
#     "d": "down",
# }
# c=input()
# for i in d:
#     if i==c:
#         for j in d[i]:
#             print(j,end=' ')

# m = {
#     "a": ["apple", "abandon", "ant"],
#     "b": ["banana", "bee", "become"],
#     "c": ["cat", "come"],
#     "d": "down",
# }
# a=input()
# b=input()
# m[a]=b
# print(m)

# a={}
# s=input()
# for i in s:
#     if i not in a:
#         a[i]=1
#     else:
#         a[i]+=1
# print(a)

print(chr(ord('b')))